Originally Posted by cknobman
Run the 100m twice as fast?? LOL your a fool if you believe that. Sure they will run it faster but TWICE as fast?? NO.
I would place a serious wager on the marathon as well. I would be willing to wager that a pro tennis players (especially the top players) endurance if far greater than any pro running back.
running backs train for explosive power and speed, but not necc for endurance. not to mention rbacks dont play every down.